powdery mildew

noun

1
: an ascomycetous fungus (family Erysiphaceae) producing abundant powdery conidia on the host
2
: a plant disease caused by a powdery mildew

Examples of powdery mildew in a Sentence

Recent Examples on the Web
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Several fungal diseases, including tar spot, leaf spot, and powdery mildew, can impact holly foliage. Kim Toscano, Southern Living, 11 Dec. 2024 Mountain ash is also susceptible to few fungal diseases such as apple scab, cedar-quince rust, and powdery mildew. Rita Pelczar, Better Homes & Gardens, 20 Nov. 2024 With leaf spot or powdery mildew, hand-pick and throw out diseased foliage. Brandee Gruener, Southern Living, 19 Nov. 2024 Plants require good drainage to prevent root rot, and the foliage is susceptible to powdery mildew. Kim Toscano, Southern Living, 3 Oct. 2024 See all Example Sentences for powdery mildew 

Word History

First Known Use

1889, in the meaning defined at sense 1

Time Traveler
The first known use of powdery mildew was in 1889

Dictionary Entries Near powdery mildew

Cite this Entry

“Powdery mildew.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/powdery%20mildew. Accessed 22 Dec. 2024.

Kids Definition

powdery mildew

noun
: a fungus that is a parasite and produces a large number of powdery spores on the host
also : a plant disease caused by such a fungus

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